Earlier quoted context omitted.
The human body have an amazing ability to adapt to the environment and we will survive as long as energy intake match energy expenditure. The only category that need some attention is protein where having too little or too much can lead to issues. An Inuit from Greenland is no more or less healthy than an American or farmer from Brazil because of what they eat.
Thanks for the heads up, since you've told me that all food is equal I'm going to switch my diet to only include Soda, Doritos and Hotpockets. I'm sure my body will adapt amazingly.
They are equal, as anybody with rudimentary knowledge of biochemistry can tell. Modern processed food have the added benefit of micronutrient fortification so your need of vitamins should be met mostly in case you actually plan to follow that diet.
The appeal of a "balanced and natural" diet has a mostly puritan origin but its benefits are far from clear. The only proven method to delay the onset of aging is caloric restriction. Kale and supplements are mostly placebo.